Been working on a customers 05 6.0 and had to remove the turbo to replace the rubbers hose to the egr cooler. Line was leaking. Installed all new orings on everything. New oil feed gasket and oil feed oring and orings on drain back tube. Truck made good boost before I took it apart. Now I have nothing. The turbo sat on the work bench for about a week. In the time it sat could the unison ring on the varible vane have seized to the housing? Or could the actutor have gone bad? I cleaned the exhaust back pressure sensor. I'm at the end of my patience with this truck. This truck has been so half assed in the past its like every corner I turn I find ****ty work or failing parts your guys help would be greatly appreciated.

There's no way the unison ring seized while sitting off the trick for a week and unlikely the VGT solenoid went bad. You check the VGT connection? I've seen the tabs break and not keep the connector in place and cause a bad connection. Any codes?

Even though the black hose from the MAP sensor to intake is hooked up, have you checked the hose for splits or cracks? Can you hear any hissing or air rushing under the hood when running or trying to accelerate?

Stick a bobby pin or needle or something small into the copper barbed fitting that sticks up out of the intake manifold that the MAP hose connects to. Sometimes they get clogged up and need cleaned out and can cause a misreading of no boost through the MAP sensor.

l BRYAN l

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Checked everything again when i got home. Did clean the map sensor port out to check.
Took it for a drive it mad about 10psi and is very sluggish on making it. Still got a feeling it is the unison ring sticking. No codes yet.

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